The work function of aluminium is 4.2 ev If two photons, ea…

Physics Electron, Photon, Photoelectric Effect and X-rays Photon and Photoelectric Effect MCQ (Single Correct)

The work function of aluminium is 4.2 ev If two photons, each of energy 3.5 ev strike an electron of aluminium, then emission of electrons will be

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Data is incomplete

Depend upon the density of the surface

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The correct answer is:

For emission of electrons incident energy of each photon must be greater than work function (threshold energy).

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